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TABLE 2
<br /> Historical Groundwater Monitoring and Analytical Data
<br /> 7-Eleven Store#17334
<br /> 4501 North Pershing Avenue
<br /> Stockton, California
<br /> Well IDI Ethyl- MTBE Dissolved
<br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G TPH-D 8020 8260 TBA DIPE ETBE TAME Oxygen DTW SPT WTE
<br /> TOC !L 1L 1L !L !L ILI ftiall-I !L 1L !L (mg/L feet feet feet
<br /> MW-3 cont 02/17/99 <0 5 12 14 10 370 <5 <5 <20 <5 <5 <5 030 1505 000 -761
<br /> 05/21/99 091 162 529 364 217 14 <20 <5 <5 <5 050 1493 000 -749
<br /> MW-4
<br /> 6 69 12119197 51 <5 18 61 3,600 - 3,000 3,800 <1,000 <250 <250 <250 012 1879 0 00 :-12 10
<br /> 03/22/98 61 2 75 43 2,600 - 3,100 <4,000 <200 <200 <200 021 1418 000 -749
<br /> 06/15/98 24 54 62 13 3,200 - - 2,700 <2,500 <125 <125 <125 190 1417 000 -889
<br /> 08/25198 26 47 79 29 1,800 - - 1,220 <1250 <125 <125 <125 -- 1558 000 -889
<br /> 12/29/98 <0 3 <0 3 <0 3 147 2,200 - 3,360 845 <100 <100 <100 100 1542 000 -873
<br /> 02117/99 <5 <5 53 <5 3,400 - 3,100 4,300 <1000 <250 <250 <250 030 1460 000 -791
<br /> 05/21/99 44 528 109 3,84 1,750 - - 4,710 <400 <100 I <100 <100 050, 1443 000, -774
<br /> MW-5A
<br /> 7 22 12/29/98 10,400 33,400 4,580 26,900 88,600 - - 17,200 <2000 <500 <500 <500 080 1552 000 -830
<br /> 02/17/99 4,400 19,000 2,300 17,000 90,000 - 3,900 4,800 <1000 <250 <250 <250 045 1469 000 -747
<br /> 05/21/99 7,010 21,100 2,890 16,000 103,000 -» 10,400 <1000 <250 <250 <250 050 1456 000 -734
<br /> 7 46 12/29/98 3,410 19,800 2,610 16,700 63,400 - - 1,480 <100 <25 <25 <25 120 1576 000 -830
<br /> 2117199 11 240 120 780 5,300 <5 <5 <20 <5 <5 <5 025 1490 000 -744
<br /> 051211991 1001 214 38 2,610 8,780 30 <100 <25 <25 <25 020 1479 000 -7 33
<br /> Explanation
<br /> --=Not available/not sampled TOC=Top of casing elevation(in feet above mean sea level)
<br /> TPH-G=Total petroleum hydrocarbons as-gasoline DTW=Depth to water
<br /> MTBE=Methyl-tort-butyl-ether SPT=Separate-phase hydrocarbon thickness
<br /> TBA=Tertiary Butanol WTE=Water table elevation
<br /> DIPE=Di-isopropyl ether Ng/L=Micrograms per liter
<br /> ETBE= Ethyl-tertiary-butyl ether mg/L=Milligrams per liter
<br /> TAME=Tertiary-amyl-methyl ether ND=Not Detected
<br /> I �
<br /> ' 17334TB2 WK4 Page 2 of 2
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